Cov impurities tuaj yeem txhim kho qhov ua tau zoo ntawm PLEDs, raws li kev tshawb fawb tshiab luam tawm hauv EPJB. Nws tau pom nyob rau hauv txoj kev tshawb no hais tias thaum muaj kev sib cuam tshuam ntawm triplet excitons thiab impurities embedded nyob rau hauv nws cov polymer txheej tshwm sim, nws muaj peev xwm ua tau ib tug siab tshaj qhov kev cia siab ntawm cov efficiency ntawm PLEDs. Molecular dynamics simulations qhia tau hais tias lub mysterious high efficiency rau polymer LEDs yog tiag tiag vim muaj kev cuam tshuam ntawm triplet excitons nyob rau hauv nws cov polymer saw thiab unpaired electrons nyob rau hauv nws cov molecular impurities. Raws li qhov kev sim, qhov ua tau zoo ntawm luminous tuaj yeem ncav cuag 83%.
